Knockdown oven.



, Patented .Iuly 8.1902. 'W. -H. DAHMAN.

KNOCKDUWH OVEN.

Application led Apr. 24, 1902.)

5 Sheets-,Sheet l.

(No Model.)

ma wams Pneus co. PNoTaLrmo.. WASHINGTON. n. cA

KNUCKDOWN DVEN. l

{Aplicauon med Apr. 24.1902.;

5 Sheets-Sheet 2.

(No Model.)

MM, j

o e o No. 704,300. Patented .Iuly 8, i902.

W. H. DAHMAN.

KNUCKDOWN OVEN.

(Application filed Apr. 24, i902.)

(No Model.) l 5 Sheeis-Sheei 3.

9 ,zo H .4 M 2j v lil@ 20 2 I o a c u o e o j 2.7 27 /J/e J6 46 46 l 7' f5 j;

mi nofws Pneus co., momuwo.. wAsmNaraM. b. c.

No. 704,300. Patented July 8, i902.

W. H. DAHMAN.

K NCKDOWN VEN.

(Application filed Apr. 24` 1902!y (N0 Model.) l 5 Sheets-Sheet 4.

mmnmmlzfll. yum|1mumIumu|uumumuulllllllll N di zo* mmmmmmlmml IHK 10N, o. c., THE NORME PETERS CO., PHOTO-HTMC., WASHING W. H. DAHMAN.

KNOCKDOWN OVEN.

(Application led Apr. 24. 1902.)

(No Model.) x 5 Sheets-Sheet 5.

No. 704,300. Patented July 8," |902.

y IHHIHHIIIHILIIIIII' Il14|lIlHIIHHIIIIIHIIIIIHIHIHHIIMIDI 1 I IHIIIHUHHIIIIII l s I. I l I l I I Il HIIIIIHHIHIIIHH Illlllltlll. E

Y I I "v/ Wmo/14M UNITED STATES PATENT OFFICE.

VIIILIAM H. DAHMAN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO A. GEISEL. MANUFACTURING COMPANY, OF ST. LOUIS, MISSOURI.

KNOCKDOWN OVEN.

SPECIFICATION forming' part of Letters Patent No. 704,300, dated July 8, 1902.

Application filed April 24, 1902. Serial No. 104,498. (No model.)

To all 7,071,077?, t may concern.-

Be it known that 1, WILLIAM H. DAHMAN, ofthe city of St. Louis, State otMissouri, have invented certain new and useful Improvements in Knockdown Ovens, of which the tollowing is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

Mylnvention relates to knockdown ovens; and it consists of the novel construction, combination, and arrangement of parts hereinafter shown, described, and claimed.

My object is to construct an oven in such a way that the parts making severalovens may be nested and packed for shipping and then unpacked and set up for use; and my invention consists of a bottom having a heatopening at its center, flanges extending upwardly from the side edges of the bottom, stop-tongues cut from the bottom and extending upwardly inside of the flanges, an imperforate end plate extending upwardly from one end of the bottom, a second end plate extending upwardly from the other end of the bottom and having a door-opening, a door attached to said second end plate for closing said door-opening, flanges extending inwardly from the edges of both of said end plates, there being fastening-tongue openings through said end plates immediately inside of said flanges, all in one shipping-piece, a plate adapted to lit betweensaid end plates and form the side pieces and-top, s aid top being curved, anges extending inwardly from the lower edges of said sidesand adapted to fit between the iianges extending upwardly from the sides of the bottom and said stop-tongues, so as to hold the side plates in position, spacing-flanges extending inwardly from the ends of the side plates, spacingblocks extending inwardly from the side plates at points intermediate of their ends, a lining placed in position against the inner faces of said spacing-blocks and the inner edges of said spacing-flanges, so as to form au air-chamber between the( lining and side plates and top, said lining beinglongitudinally corrugated to make it flexible and said lining having a limited amount of periciations to distribute heat from said chamber, bolts inserted through the side plates,through l the spacing-blocks, and through the lining to hold the lining removably in position, shelffianges extending4A inwardly from the lower edges of said lining, said flanges being some distance above the bottom, fastening-tongues riveted to the edges of the top-plate and adapted to be inserted through said fastening-tongue openings formed in the end plates, said tongues being bent after insertion through said openings to hold the partsA in position, and a handle attached to the top plate, all forming a second shipping-piece, and a shelf adapted to be supported by said shelf-anges and forming a third shippingpiece.

Figure 1 is a perspective of my improved knockdown oven set up ready for use. Fig. 2 is a cross-section of the oven shown in Fig. 1. 3 is a sectional detail on the line 3 3 of Fig. 1. Fig. et is a sectional detail on the line e 4 of Fig. 2. showing the operation of setting up the oven.

Fig.' 6 is a perspective showing the shelf from` the bottom. Fig. 7 is a sectional det-ail on the line 7 7 of Fig. 5, with the parts in position' for use. Figs. 8, 9, and 10 show how the parts may be nested to place three ovens in the space which would normally be for one set-up oven. Fig. 8 is a top plan yView of the shipping-box partly filled. Fig. 9 is a top plan view similar to Fig. 8 with the remaining parts inserted, Vparts being broken away to illustrate the method of assembling or nesting. Fig. 10 is a vertical cross-section of the parts shown in Fig. 9.

Referring to the drawings in detail, the bottom 11 has a heat-opening 12 at its center, and the flanges 13 extend upwardly from the side edges of the bottom. The stop-tongues 14 are cut from the bottom and turned upwardly inside of the flanges. The imperforate end plate 15 extends upwardly from one end of the bottom, and the second end plate 16 extends upwardly from the other end of the bottom and has a door-opening 17 to provide access to the oven. The door 18 is connected to the end plate 16 by the hinges 19 and swings upwardly to close the door-opening 17, said door being heldin a closed position by the latch 20. The flanges 21 extend inwardly from the edges of the end plates 15 Fig. 5 is a perspective IOS and 16, and the fastening-tongue openings 22 are formed through the end plates and 16 immediately inside of the flanges. The bottom 11, the end plates 15 and 16, andthe door 18 constitute one shipping-piece. A single plate is adapted to t between the end plates 15 and 16 and form the sides 23 and 24 and the top 25, said top being curved. The flanges 26 extend inwardly from the lower edges of the sides 23 and 24 and are adapted to fit between the flanges 13 and the stop-tongues 14, so as to hold the lower edges of the sides from lateral motion. The spacing-flanges 27 extend inwardly from the ends of the sides 23'and 24, and the spacing blocks or brackets 28 extend inwardly from thesides 23 and 24 at points between the flanges 27, and the lining is placed in position against the inner faces of the spacing-blocks and the inner edges of the spacing-flanges, so as to form an airchamber between the lining and the sides and top. The lining comprises a sheet 29 of corrugated tin and strips 30 and 31 of non-heatconducting material, such as asbestos paper, placed along the edges of the sheet 29. The liningis longitudinally corrugated to make it flexible and has a limited amount of perforations 32 in its upper part to distribute the heat from the air-chamber into the upper part of the oven or baking-chamber. The lower edges of the tin plate 29 are bent upon themselves to clamp the asbestos sheets 30 and 3l, and said lower edges are bent inwardly to form the shelf-flanges 33 and 34 some distance above the bottom 11. Bolts 35 are inserted through the sides 23 and 24, through the spacing-blocks 28, and through the lining to hold the parts together, as shown in detail in Fig. 4. The fastening-tongues 35 are secured to the top by means of rivets 36, and said fastening-tongues are adapted to be inserted through the openings 22 and clenched against the flanges 21 to hold the parts together, as shown in detail in Fig. 3. The handle 37 is secured to the top in the usual way.

The sides 23 and 24, the top 25, the flanges 2G, the flanges 27, the spacing-blocks 28, the lining 29, 30, and 3l, the flanges 33 and 34, the fastening-tongues 35, and the handle 37 constitute the second shipping piece. A shelf is adapted to rest upon the flanges 33 and 34 above the bottom 11 and constitute the third shipping-piece. y The shelf comprises the upper plate 38 and the lower plate 39, attached together at their edges, the space between said plates being packed with mineral wool 40, so as to reduce the heat-conf ducting qualities of the shelf. The heat passing upwardly through the opening 12 strikes the shelf and then passes laterally into the hot-air chamber 41 between the lining and the outer wall and passes upwardly through said chamber and is distributed into the baking-chamber 42 through the perforations 32.

The sheets of asbestos 30 and 3l and the mineral wool are employed to protect the bread or pastry in the oven from the direct influence of the heat.

In nesting the oven for packing and shipping I take a box slightly larger than the bottom of the oven, and I place two of the first shipping-pieces in the box, so that one bottom rests upon the other, said bottoms being crosswise of each other, so that. the end plates are in the form of a square, as shown in Figs. 8 and 9. Then I place one shelf outside of one of the oven-doors, another shelf outside of the other oven-door, and the third shelf inside of-one of the imperforate end plates, as shown in Fig. 8. Then I place one of the second shipping-pieces in the box between the third shelf and the opposite end plate, taking care to swing the lower edges of the side plates inwardly. Then I placea second one of the second shipping-pieces downwardly around the first and a third one of the second shipping-pieces around the second, and finally I take the third one of the bottoms and place it on top of the nest of second shipping-pieces, with the end pieces extending downwardly upon opposite sides of this nest, as clearly shown in Fig. 10. Thus it will be seen that I succeed in nesting and packing threeof my improved knockdown ovens in a box which would only contain one of the ovens in its set-up condition.

I claim- 1. In a knockdown oven, a bottom; `end plates extending upwardly from the ends of the bottom, and forming one shipping-piece; and a plate forming side pieces and a top adapted to fitbetween the end plates and form a second shipping-piece, said pieces carrying means of securing the parts together, substantially as specified.

2. In a knockdown oven, a bottom; end plates extending upwardly from the bottom and formed integrally therewith; a plate forming sides and top adapted to t between the end plates; a lining mounted in the sides and top as required to make a flexible second shipping-piece; and means carried by said shipping-pieces for securing the parts together, substantially as specified.

3. In a knockdown oven, a bottom; end plates extending upwardly from the ends of the bottom,there being a door in one end plate; a plate forming sides and top and adapted to fit between said end platesga lining attached to the sides and top to form an air-space;

means of securing the parts together; and a shelf adapted to be mounted above the bottom, substantially as specified.

4. In a knockdown oven, a bottom having a heat-opening at its center; flanges extending upwardly from the side edges of the bottom; stop-tongues cut from the bottom, and extending upwardly inside of the flanges; au imperforate end plate extending upwardly from one end of the bottom; a second end plate extending upwardly from the other end of the bottom and having a door-opening; a door attached to the second end plate, all

IOS

IIC

i l l l l l l l l l l l fforminga single shipping-piece; a plate forming side pieces and the top adapted to t between said end plates; anges extending inwardly from the lower edges of said sides and adapted to iit between the iianges extending upwardly from the bottom and the stoptongues; a lining mounted within the sides and top to form an air-space, said lining having a limited number of perforations in its upper part, and said lining being iiexible; and sheets of asbestos paper outside of the lower parts of said lining, all forming a seeond shipping-piece; and a shelf adapted to be mounted between the lower edges of said lining and forming a third shipping-piece, substantially as specified.

5. Akuockdown oven eomprisinga bottom having a heat-opening at its center; flanges extending upwardly from the side edges of the bottom; stop-tongues ent from the bottom and extending upwardly from one end of the bottom; a second end plate extending upwardly from the other end of the bottom, and having a door-opening; a door attached to said seeond end plate for Closing said dooropening; iianges extending inwardly from the edges of both of said end plates, there being fastening tongue openings through said end plates immediately inside of said lianges, all in one shipping-piece; a plate adapted to fit between said end plates and form the side pieces and top, said top being Curved; iianges extending inwardly from the lower edges of said sides and adapted to iit between the flanges extending upwardly from the sides of the bottom, and said stoptongues, so as to hold the side plates in position; spacing flanges extending inwardly from the ends of the side plates; spacingbloeks extending inwardly from the side plates atpoints intermediate of their ends; a lining placed in position against the inner faces of said spacing-blocks and the inner edges of said spacing-flanges, so as to form an air-chamber between the lining and side plates and top, said lining being longitudinally corrugated to make it iiexible and said lining having a limited amount of perforations to distribute heat from said chamber; bolts inserted through the side plates,through the spacing-blocks, and through the lining to hold the lining removably in position; shelf-flanges extending inwardly from the lower edges of said lining, said ianges being some distance above the bottom; fasteningtongues riveted to the edges of the top plate and adapted to be inserted through said fastening-tongue openings formed in the end plates, said tongues being bent after insertion through said openings to hold the parts in position; and a handle attached to the top plate, all forming a second shipping-piece; and a shelf adapted to be supported by said shelf-anges, and forming a third shippingpiece, substantially as speciiied.

In testimony whereof I a'fix my signature in presence of two witnesses.

WILLIAM H. DAHMAN.

Witnesses:

ALFRED A. Eroxs, JOHN C. HIGDoN. 

